Add tests for parse plan file

migration/plan_test.go

@@ -0,0 +1,48 @@
+package migration
+
+import (
+	"os"
+	"testing"
+)
+
+func TestNewPlan(t *testing.T) {
+	cases := []struct {
+		desc     string
+		planFile string
+		ok       bool
+	}{
+		{
+			desc:     "valid",
+			planFile: "test-fixtures/import_simple.tfplan.json",
+			ok:       true,
+		},
+		{
+			desc:     "invalid",
+			planFile: "test-fixtures/invalid.tfplan.json",
+			ok:       false,
+		},
+		{
+			desc:     "unknown format version",
+			planFile: "test-fixtures/unknown_format_version.tfplan.json",
+			ok:       false,
+		},
+	}
+
+	for _, tc := range cases {
+		t.Run(tc.desc, func(t *testing.T) {
+			planJSON, err := os.ReadFile(tc.planFile)
+			if err != nil {
+				t.Fatalf("failed to read file: %s", err)
+			}
+
+			got, err := NewPlan(planJSON)
+			if tc.ok && err != nil {
+				t.Fatalf("unexpected err = %s", err)
+			}
+
+			if !tc.ok && err == nil {
+				t.Fatalf("expected to return an error, but no error, got: %#v", got)
+			}
+		})
+	}
+}

migration/test-fixtures/invalid.tfplan.json

@@ -0,0 +1 @@
+{ "invalid":

migration/test-fixtures/unknown_format_version.tfplan.json

@@ -0,0 +1 @@
+{ "format_version": "0" }