[chore]: enable len and empty rules from testifylint

Signed-off-by: Matthieu MOREL <matthieu.morel35@gmail.com>

.golangci.yml

@@ -306,13 +306,11 @@ linters-settings:
   testifylint:
     enable-all: true
     disable:
-      - empty
       - error-is-as
       - error-nil
       - expected-actual
       - float-compare
       - go-require
-      - len
       - negative-positive
       - require-error
       - suite-extra-assert-call

baggage/baggage_test.go

@@ -815,25 +815,25 @@ func TestBaggageSetMember(t *testing.T) {
 	assert.NoError(t, err)
 	assert.NotContains(t, b0.list, key)
 	assert.Equal(t, baggage.Item{}, b1.list[key])
-	assert.Equal(t, 0, len(b0.list))
-	assert.Equal(t, 1, len(b1.list))
+	assert.Empty(t, b0.list)
+	assert.Len(t, b1.list, 1)
 
 	m.value = "v"
 	b2, err := b1.SetMember(m)
 	assert.NoError(t, err)
 	assert.Equal(t, baggage.Item{}, b1.list[key])
 	assert.Equal(t, baggage.Item{Value: "v"}, b2.list[key])
-	assert.Equal(t, 1, len(b1.list))
-	assert.Equal(t, 1, len(b2.list))
+	assert.Len(t, b1.list, 1)
+	assert.Len(t, b2.list, 1)
 
 	p := properties{{key: "p"}}
 	m.properties = p
 	b3, err := b2.SetMember(m)
 	assert.NoError(t, err)
 	assert.Equal(t, baggage.Item{Value: "v"}, b2.list[key])
 	assert.Equal(t, baggage.Item{Value: "v", Properties: []baggage.Property{{Key: "p"}}}, b3.list[key])
-	assert.Equal(t, 1, len(b2.list))
-	assert.Equal(t, 1, len(b3.list))
+	assert.Len(t, b2.list, 1)
+	assert.Len(t, b3.list, 1)
 
 	// The returned baggage needs to be immutable and should use a copy of the
 	// properties slice.
@@ -849,8 +849,8 @@ func TestBaggageSetMember(t *testing.T) {
 	assert.NotContains(t, b3.list, m.key)
 	assert.Equal(t, baggage.Item{Value: "v", Properties: []baggage.Property{{Key: "p"}}}, b4.list[key])
 	assert.Equal(t, baggage.Item{}, b4.list[m.key])
-	assert.Equal(t, 1, len(b3.list))
-	assert.Equal(t, 2, len(b4.list))
+	assert.Len(t, b3.list, 1)
+	assert.Len(t, b4.list, 2)
 }
 
 func TestBaggageSetFalseMember(t *testing.T) {
@@ -862,16 +862,16 @@ func TestBaggageSetFalseMember(t *testing.T) {
 	assert.Error(t, err)
 	assert.NotContains(t, b0.list, key)
 	assert.Equal(t, baggage.Item{}, b1.list[key])
-	assert.Equal(t, 0, len(b0.list))
-	assert.Equal(t, 0, len(b1.list))
+	assert.Empty(t, b0.list)
+	assert.Empty(t, b1.list)
 
 	m.value = "v"
 	b2, err := b1.SetMember(m)
 	assert.Error(t, err)
 	assert.Equal(t, baggage.Item{}, b1.list[key])
 	assert.Equal(t, baggage.Item{Value: ""}, b2.list[key])
-	assert.Equal(t, 0, len(b1.list))
-	assert.Equal(t, 0, len(b2.list))
+	assert.Empty(t, b1.list)
+	assert.Empty(t, b2.list)
 }
 
 func TestBaggageSetFalseMembers(t *testing.T) {
@@ -883,25 +883,25 @@ func TestBaggageSetFalseMembers(t *testing.T) {
 	assert.NoError(t, err)
 	assert.NotContains(t, b0.list, key)
 	assert.Equal(t, baggage.Item{}, b1.list[key])
-	assert.Equal(t, 0, len(b0.list))
-	assert.Equal(t, 1, len(b1.list))
+	assert.Empty(t, b0.list)
+	assert.Len(t, b1.list, 1)
 
 	m.value = "v"
 	b2, err := b1.SetMember(m)
 	assert.NoError(t, err)
 	assert.Equal(t, baggage.Item{}, b1.list[key])
 	assert.Equal(t, baggage.Item{Value: "v"}, b2.list[key])
-	assert.Equal(t, 1, len(b1.list))
-	assert.Equal(t, 1, len(b2.list))
+	assert.Len(t, b1.list, 1)
+	assert.Len(t, b2.list, 1)
 
 	p := properties{{key: "p"}}
 	m.properties = p
 	b3, err := b2.SetMember(m)
 	assert.NoError(t, err)
 	assert.Equal(t, baggage.Item{Value: "v"}, b2.list[key])
 	assert.Equal(t, baggage.Item{Value: "v", Properties: []baggage.Property{{Key: "p"}}}, b3.list[key])
-	assert.Equal(t, 1, len(b2.list))
-	assert.Equal(t, 1, len(b3.list))
+	assert.Len(t, b2.list, 1)
+	assert.Len(t, b3.list, 1)
 
 	// The returned baggage needs to be immutable and should use a copy of the
 	// properties slice.
@@ -917,8 +917,8 @@ func TestBaggageSetFalseMembers(t *testing.T) {
 	assert.NotContains(t, b3.list, m.key)
 	assert.Equal(t, baggage.Item{Value: "v", Properties: []baggage.Property{{Key: "p"}}}, b4.list[key])
 	assert.Equal(t, baggage.Item{}, b4.list[m.key])
-	assert.Equal(t, 1, len(b3.list))
-	assert.Equal(t, 1, len(b4.list))
+	assert.Len(t, b3.list, 1)
+	assert.Len(t, b4.list, 1)
 }
 
 func TestNilBaggageMembers(t *testing.T) {

exporters/otlp/otlplog/otlploggrpc/client_test.go

@@ -556,7 +556,7 @@ func TestClient(t *testing.T) {
 		require.NoError(t, client.UploadLogs(ctx, resourceLogs))
 		require.NoError(t, client.UploadLogs(ctx, resourceLogs))
 
-		require.Equal(t, 1, len(errs))
+		require.Len(t, errs, 1)
 		want := fmt.Sprintf("%s (%d log records rejected)", msg, n)
 		assert.ErrorContains(t, errs[0], want)
 	})

exporters/otlp/otlplog/otlploggrpc/exporter_test.go

@@ -228,7 +228,7 @@ func TestExporter(t *testing.T) {
 		require.NoError(t, e.Export(ctx, records))
 		require.NoError(t, e.Export(ctx, records))
 
-		require.Equal(t, 1, len(errs))
+		require.Len(t, errs, 1)
 		want := fmt.Sprintf("%s (%d log records rejected)", msg, n)
 		assert.ErrorContains(t, errs[0], want)
 	})

exporters/otlp/otlplog/otlploghttp/client_test.go

@@ -558,7 +558,7 @@ func TestClient(t *testing.T) {
 		require.NoError(t, client.UploadLogs(ctx, resourceLogs))
 		require.NoError(t, client.UploadLogs(ctx, resourceLogs))
 
-		require.Equal(t, 1, len(errs))
+		require.Len(t, errs, 1)
 		want := fmt.Sprintf("%s (%d log records rejected)", msg, n)
 		assert.ErrorContains(t, errs[0], want)
 	})
@@ -697,7 +697,7 @@ func TestConfig(t *testing.T) {
 		t.Cleanup(func() { close(rCh) })
 		t.Cleanup(func() { require.NoError(t, exp.Shutdown(ctx)) })
 		assert.NoError(t, exp.Export(ctx, make([]log.Record, 1)), "failed retry")
-		assert.Len(t, rCh, 0, "failed HTTP responses did not occur")
+		assert.Empty(t, rCh, "failed HTTP responses did not occur")
 	})
 
 	t.Run("WithRetryAndExporterErr", func(t *testing.T) {

exporters/otlp/otlpmetric/otlpmetricgrpc/internal/oconf/options_test.go

@@ -324,7 +324,7 @@ func TestConfigs(t *testing.T) {
 					assert.NotNil(t, c.Metrics.GRPCCredentials)
 				} else {
 					// nolint:staticcheck // ignoring tlsCert.RootCAs.Subjects is deprecated ERR because cert does not come from SystemCertPool.
-					assert.Equal(t, 1, len(c.Metrics.TLSCfg.RootCAs.Subjects()))
+					assert.Len(t, c.Metrics.TLSCfg.RootCAs.Subjects(), 1)
 				}
 			},
 		},

exporters/otlp/otlpmetric/otlpmetricgrpc/internal/otest/client.go

@@ -208,11 +208,11 @@ func RunClientTests(f ClientFactory) func(*testing.T) {
 			require.NoError(t, client.ForceFlush(ctx))
 			rm := collector.Collect().Dump()
 			// Data correctness is not important, just it was received.
-			require.Greater(t, len(rm), 0, "no data uploaded")
+			require.NotEmpty(t, rm, "no data uploaded")
 
 			require.NoError(t, client.Shutdown(ctx))
 			rm = collector.Collect().Dump()
-			assert.Len(t, rm, 0, "client did not flush all data")
+			assert.Empty(t, rm, "client did not flush all data")
 		})
 
 		t.Run("UploadMetrics", func(t *testing.T) {
@@ -269,7 +269,7 @@ func RunClientTests(f ClientFactory) func(*testing.T) {
 			require.NoError(t, client.UploadMetrics(ctx, resourceMetrics))
 			require.NoError(t, client.Shutdown(ctx))
 
-			require.Equal(t, 1, len(errs))
+			require.Len(t, errs, 1)
 			want := fmt.Sprintf("%s (%d metric data points rejected)", msg, n)
 			assert.ErrorContains(t, errs[0], want)
 		})

exporters/otlp/otlpmetric/otlpmetricgrpc/internal/transform/error_test.go

@@ -57,7 +57,7 @@ func TestMultiErr(t *testing.T) {
 		// language so this doesn't become a change-indicator.
 		msg := me.Error()
 		lines := strings.Split(msg, "\n")
-		assert.Equalf(t, 4, len(lines), "expected a 4 line error message, got:\n\n%s", msg)
+		assert.Lenf(t, lines, 4, "expected a 4 line error message, got:\n\n%s", msg)
 		assert.Contains(t, msg, name)
 		assert.Contains(t, msg, e0.Error())
 		assert.Contains(t, msg, testErr.Error())

exporters/otlp/otlpmetric/otlpmetrichttp/client_test.go

@@ -189,7 +189,7 @@ func TestConfig(t *testing.T) {
 		t.Cleanup(func() { close(rCh) })
 		t.Cleanup(func() { require.NoError(t, exp.Shutdown(ctx)) })
 		assert.NoError(t, exp.Export(ctx, &metricdata.ResourceMetrics{}), "failed retry")
-		assert.Len(t, rCh, 0, "failed HTTP responses did not occur")
+		assert.Empty(t, rCh, "failed HTTP responses did not occur")
 	})
 
 	t.Run("WithRetryAndExporterErr", func(t *testing.T) {

exporters/otlp/otlpmetric/otlpmetrichttp/internal/oconf/options_test.go

@@ -324,7 +324,7 @@ func TestConfigs(t *testing.T) {
 					assert.NotNil(t, c.Metrics.GRPCCredentials)
 				} else {
 					// nolint:staticcheck // ignoring tlsCert.RootCAs.Subjects is deprecated ERR because cert does not come from SystemCertPool.
-					assert.Equal(t, 1, len(c.Metrics.TLSCfg.RootCAs.Subjects()))
+					assert.Len(t, c.Metrics.TLSCfg.RootCAs.Subjects(), 1)
 				}
 			},
 		},

exporters/otlp/otlpmetric/otlpmetrichttp/internal/otest/client.go

@@ -208,11 +208,11 @@ func RunClientTests(f ClientFactory) func(*testing.T) {
 			require.NoError(t, client.ForceFlush(ctx))
 			rm := collector.Collect().Dump()
 			// Data correctness is not important, just it was received.
-			require.Greater(t, len(rm), 0, "no data uploaded")
+			require.NotEmpty(t, rm, "no data uploaded")
 
 			require.NoError(t, client.Shutdown(ctx))
 			rm = collector.Collect().Dump()
-			assert.Len(t, rm, 0, "client did not flush all data")
+			assert.Empty(t, rm, "client did not flush all data")
 		})
 
 		t.Run("UploadMetrics", func(t *testing.T) {
@@ -269,7 +269,7 @@ func RunClientTests(f ClientFactory) func(*testing.T) {
 			require.NoError(t, client.UploadMetrics(ctx, resourceMetrics))
 			require.NoError(t, client.Shutdown(ctx))
 
-			require.Equal(t, 1, len(errs))
+			require.Len(t, errs, 1)
 			want := fmt.Sprintf("%s (%d metric data points rejected)", msg, n)
 			assert.ErrorContains(t, errs[0], want)
 		})

exporters/otlp/otlpmetric/otlpmetrichttp/internal/transform/error_test.go

@@ -57,7 +57,7 @@ func TestMultiErr(t *testing.T) {
 		// language so this doesn't become a change-indicator.
 		msg := me.Error()
 		lines := strings.Split(msg, "\n")
-		assert.Equalf(t, 4, len(lines), "expected a 4 line error message, got:\n\n%s", msg)
+		assert.Lenf(t, lines, 4, "expected a 4 line error message, got:\n\n%s", msg)
 		assert.Contains(t, msg, name)
 		assert.Contains(t, msg, e0.Error())
 		assert.Contains(t, msg, testErr.Error())

exporters/otlp/otlptrace/otlptracegrpc/client_test.go

@@ -401,7 +401,7 @@ func TestPartialSuccess(t *testing.T) {
 	t.Cleanup(func() { require.NoError(t, exp.Shutdown(ctx)) })
 	require.NoError(t, exp.ExportSpans(ctx, roSpans))
 
-	require.Equal(t, 1, len(errs))
+	require.Len(t, errs, 1)
 	require.Contains(t, errs[0].Error(), "partially successful")
 	require.Contains(t, errs[0].Error(), "2 spans rejected")
 }

exporters/otlp/otlptrace/otlptracehttp/client_test.go

@@ -412,7 +412,7 @@ func TestPartialSuccess(t *testing.T) {
 	err = exporter.ExportSpans(ctx, otlptracetest.SingleReadOnlySpan())
 	assert.NoError(t, err)
 
-	require.Equal(t, 1, len(errs))
+	require.Len(t, errs, 1)
 	require.Contains(t, errs[0].Error(), "partially successful")
 	require.Contains(t, errs[0].Error(), "2 spans rejected")
 }
@@ -443,7 +443,7 @@ func TestOtherHTTPSuccess(t *testing.T) {
 			err = exporter.ExportSpans(ctx, otlptracetest.SingleReadOnlySpan())
 			assert.NoError(t, err)
 
-			assert.Equal(t, 0, len(errs))
+			assert.Empty(t, errs)
 		})
 	}
 }

exporters/prometheus/exporter_test.go

@@ -867,14 +867,14 @@ func TestIncompatibleMeterName(t *testing.T) {
 	err = testutil.GatherAndCompare(registry, file)
 	require.NoError(t, err)
 
-	assert.Equal(t, 1, len(errs))
+	assert.Len(t, errs, 1)
 
 	// A second collect shouldn't trigger new errors
 	_, err = file.Seek(0, io.SeekStart)
 	assert.NoError(t, err)
 	err = testutil.GatherAndCompare(registry, file)
 	require.NoError(t, err)
-	assert.Equal(t, 1, len(errs))
+	assert.Len(t, errs, 1)
 }
 
 func TestShutdownExporter(t *testing.T) {

exporters/zipkin/zipkin_test.go

@@ -309,7 +309,7 @@ func TestExportSpans(t *testing.T) {
 	exporter, err := New(collector.url, WithLogger(logger))
 	require.NoError(t, err)
 	ctx := context.Background()
-	require.Len(t, ls.Messages, 0)
+	require.Empty(t, ls.Messages)
 	require.NoError(t, exporter.ExportSpans(ctx, spans[0:1]))
 	require.Len(t, ls.Messages, 1)
 	require.Contains(t, ls.Messages[0], "send a POST request")

internal/global/meter_test.go

@@ -232,7 +232,7 @@ func TestMeterProviderDelegatesCalls(t *testing.T) {
 	assert.Equal(t, 1, tMeter.siCount)
 	assert.Equal(t, 1, tMeter.siUDCount)
 	assert.Equal(t, 1, tMeter.siHist)
-	assert.Equal(t, 1, len(tMeter.callbacks))
+	assert.Len(t, tMeter.callbacks, 1)
 
 	// Because the Meter was provided by testMeterProvider it should also return our test instrument
 	require.IsType(t, &testCountingFloatInstrument{}, ctr, "the meter did not delegate calls to the meter")

internal/shared/otlp/otlpmetric/oconf/options_test.go.tmpl

@@ -324,7 +324,7 @@ func TestConfigs(t *testing.T) {
 					assert.NotNil(t, c.Metrics.GRPCCredentials)
 				} else {
 					// nolint:staticcheck // ignoring tlsCert.RootCAs.Subjects is deprecated ERR because cert does not come from SystemCertPool.
-					assert.Equal(t, 1, len(c.Metrics.TLSCfg.RootCAs.Subjects()))
+					assert.Len(t, c.Metrics.TLSCfg.RootCAs.Subjects(), 1)
 				}
 			},
 		},

internal/shared/otlp/otlpmetric/otest/client.go.tmpl

@@ -208,11 +208,11 @@ func RunClientTests(f ClientFactory) func(*testing.T) {
 			require.NoError(t, client.ForceFlush(ctx))
 			rm := collector.Collect().Dump()
 			// Data correctness is not important, just it was received.
-			require.Greater(t, len(rm), 0, "no data uploaded")
+			require.NotEmpty(t, rm, "no data uploaded")
 
 			require.NoError(t, client.Shutdown(ctx))
 			rm = collector.Collect().Dump()
-			assert.Len(t, rm, 0, "client did not flush all data")
+			assert.Empty(t, rm, "client did not flush all data")
 		})
 
 		t.Run("UploadMetrics", func(t *testing.T) {
@@ -269,7 +269,7 @@ func RunClientTests(f ClientFactory) func(*testing.T) {
 			require.NoError(t, client.UploadMetrics(ctx, resourceMetrics))
 			require.NoError(t, client.Shutdown(ctx))
 
-			require.Equal(t, 1, len(errs))
+			require.Len(t, errs, 1)
 			want := fmt.Sprintf("%s (%d metric data points rejected)", msg, n)
 			assert.ErrorContains(t, errs[0], want)
 		})

internal/shared/otlp/otlpmetric/transform/error_test.go.tmpl

@@ -57,7 +57,7 @@ func TestMultiErr(t *testing.T) {
 		// language so this doesn't become a change-indicator.
 		msg := me.Error()
 		lines := strings.Split(msg, "\n")
-		assert.Equalf(t, 4, len(lines), "expected a 4 line error message, got:\n\n%s", msg)
+		assert.Lenf(t, lines, 4, "expected a 4 line error message, got:\n\n%s", msg)
 		assert.Contains(t, msg, name)
 		assert.Contains(t, msg, e0.Error())
 		assert.Contains(t, msg, testErr.Error())

log/logtest/recorder_test.go

@@ -111,7 +111,7 @@ func TestLoggerEnabledFnUnset(t *testing.T) {
 func TestRecorderEmitAndReset(t *testing.T) {
 	r := NewRecorder()
 	l := r.Logger("test")
-	assert.Len(t, r.Result()[0].Records, 0)
+	assert.Empty(t, r.Result()[0].Records)
 
 	r1 := log.Record{}
 	r1.SetSeverity(log.SeverityInfo)

sdk/log/exporter_test.go

@@ -430,7 +430,7 @@ func TestBufferExporter(t *testing.T) {
 			// Nothing to flush.
 			assert.NoError(t, e.ForceFlush(ctx), "ForceFlush empty")
 			assert.Equal(t, 1, exp.ExportN(), "Export number changed")
-			assert.Len(t, exp.Records(), 0, "exported non-zero Records")
+			assert.Empty(t, exp.Records(), "exported non-zero Records")
 		})
 
 		t.Run("ContextCancelled", func(t *testing.T) {

sdk/metric/internal/aggregate/histogram_test.go

@@ -351,7 +351,7 @@ func TestDeltaHistogramReset(t *testing.T) {
 
 	var data metricdata.Aggregation = metricdata.Histogram[int64]{}
 	require.Equal(t, 0, h.delta(&data))
-	require.Len(t, data.(metricdata.Histogram[int64]).DataPoints, 0)
+	require.Empty(t, data.(metricdata.Histogram[int64]).DataPoints)
 
 	h.measure(context.Background(), 1, alice, nil)
 
@@ -363,7 +363,7 @@ func TestDeltaHistogramReset(t *testing.T) {
 	// The attr set should be forgotten once Aggregations is called.
 	expect.DataPoints = nil
 	assert.Equal(t, 0, h.delta(&data))
-	assert.Len(t, data.(metricdata.Histogram[int64]).DataPoints, 0)
+	assert.Empty(t, data.(metricdata.Histogram[int64]).DataPoints)
 
 	// Aggregating another set should not affect the original (alice).
 	h.measure(context.Background(), 1, bob, nil)

sdk/metric/internal/exemplar/drop_test.go

@@ -20,5 +20,5 @@ func testDropFiltered[N int64 | float64](t *testing.T) {
 	var dest []Exemplar
 	r.Collect(&dest)
 
-	assert.Len(t, dest, 0, "non-sampled context should not be offered")
+	assert.Empty(t, dest, "non-sampled context should not be offered")
 }