additional tests

JuliaLang · Sep 4, 2018 · 40b2ea7 · 40b2ea7
1 parent 4f9028c
commit 40b2ea7
Showing 1 changed file with 23 additions and 7 deletions.
diff --git a/stdlib/Statistics/test/runtests.jl b/stdlib/Statistics/test/runtests.jl
@@ -60,7 +60,7 @@ end
 end
 
 @testset "mean" begin
-    @test_throws ArgumentError mean(())
+    @test_throws MethodError mean(())
     @test mean((1,2,3)) === 2.
     @test mean([0]) === 0.
     @test mean([1.]) === 1.
@@ -88,8 +88,17 @@ end
     @test mean(skipmissing([1, missing, 2])) === 1.5
     @test isequal(mean(Complex{Float64}[]), NaN+NaN*im)
     @test isequal(mean(skipmissing(Complex{Float64}[])), NaN+NaN*im)
+    @test mean(Complex{Float64}[]) isa Complex{Float64}
+    @test mean(skipmissing(Complex{Float64}[])) isa Complex{Float64}
     @test isequal(mean(abs, Complex{Float64}[]), NaN)
     @test isequal(mean(abs, skipmissing(Complex{Float64}[])), NaN)
+    @test mean(abs, Complex{Float64}[]) isa Float64
+    @test mean(abs, skipmissing(Complex{Float64}[])) isa Float64
+    @test_throws MethodError mean([])
+    @test_throws MethodError mean(skipmissing([]))
+    @test_throws MethodError mean((1 for i in 2:1))
+    @test mean(Int[]) isa Float64
+    @test mean(skipmissing(Int[])) isa Float64
 
     # Check that small types are accumulated using wider type
     for T in (Int8, UInt8)
@@ -113,10 +122,10 @@ end
 @testset "var & std" begin
     # edge case: empty vector
     # iterable; this has to throw for type stability
-    @test_throws ArgumentError var(())
-    @test_throws ArgumentError var((); corrected=false)
-    @test_throws ArgumentError var((); mean=2)
-    @test_throws ArgumentError var((); mean=2, corrected=false)
+    @test_throws MethodError var(())
+    @test_throws MethodError var((); corrected=false)
+    @test_throws MethodError var((); mean=2)
+    @test_throws MethodError var((); mean=2, corrected=false)
     # reduction
     @test isnan(var(Int[]))
     @test isnan(var(Int[]; corrected=false))
@@ -250,8 +259,15 @@ end
         @test f(skipmissing([1, missing, 2]), 0) === f([1, 2], 0)
     end
 
-    @test isequal(mean(Complex{Float64}[]), NaN)
-    @test isequal(mean(skipmissing(Complex{Float64}[])), NaN)
+    @test isequal(var(Complex{Float64}[]), NaN)
+    @test isequal(var(skipmissing(Complex{Float64}[])), NaN)
+    @test var(Complex{Float64}[]) isa Float64
+    @test var(skipmissing(Complex{Float64}[])) isa Float64
+    @test_throws MethodError var([])
+    @test_throws MethodError var(skipmissing([]))
+    @test_throws ArgumentError var((1 for i in 2:1))
+    @test var(Int[]) isa Float64
+    @test var(skipmissing(Int[])) isa Float64
 end
 
 function safe_cov(x, y, zm::Bool, cr::Bool)