Add unittests for base_numeric_type

Author: MilesCranmer

test/unittests.jl

@@ -0,0 +1,33 @@
+using Test: @test, @inferred
+using BaseType: base_numeric_type
+using DualNumbers: DualNumbers
+using DynamicQuantities: DynamicQuantities
+using Measurements: ±
+using StaticArrays: StaticArrays
+using Unitful: Unitful
+
+expected_type_pairs = [
+    Float32 => Float32,
+    Float32 => Float32,
+    Array{Float64,1} => Float64,
+    ComplexF64 => Float64,
+    Matrix{ComplexF64} => ComplexF64,
+    DualNumbers.Dual{Int64} => Int64,
+    DynamicQuantities.Quantity{Float32} => Float32,
+    typeof(1.5DynamicQuantities.u"km/s") => Float64,
+    typeof(1.5f0Unitful.u"km/s") => Float32,
+    typeof(StaticArrays.SArray{Tuple{32,3}}(randn(32, 3))) => Float64,
+    typeof(StaticArrays.SArray{Tuple{32,3}}(randn(Float32, 32, 3))) => Float32,
+    BigFloat => BigFloat,
+    typeof(1.5 ± 0.2) => Float64,
+    typeof(1.5f0 ± 0.2f0) => Float32,
+]
+
+for (x, y) in expected_type_pairs
+    @eval @test base_numeric_type($x) == $y
+    # Make sure compiler can inline it:
+    @eval @inferred typeof($y) base_numeric_type($x)
+end
+
+@test base_numeric_type(1.5DynamicQuantities.u"km/s") == base_numeric_type(typeof(1.5DynamicQuantities.u"km/s"))
+@inferred base_numeric_type(1.5DynamicQuantities.u"km/s")