test: add pointer_test.go

* Added tests and benchmarks for funcs NilPtr() & NotNilPtr()
* Changed lefthook.yml to run golangci-lint over all files.

Author: userzimmermann

lefthook.yml

@@ -15,4 +15,4 @@ pre-commit:
 
     lint:
       glob: "*.go"
-      run: golangci-lint run --fix {staged_files}
+      run: golangci-lint run --fix

pointer_test.go

@@ -0,0 +1,61 @@
+package require
+
+import (
+	"testing"
+
+	assert "github.com/stretchr/testify/assert"
+)
+
+func TestNilPtr(t *testing.T) {
+	t.Run("should accept nil pointer & return nil", func(t *testing.T) {
+		var nilPtr *int
+		assert.Nil(t, NilPtr("Test pointer", nilPtr))
+	})
+	t.Run("should panic when pointer is not nil", func(t *testing.T) {
+		assert.PanicsWithValue(t, "assertion failed: Test pointer should be a nil pointer", func() {
+			value := "test"
+			NilPtr("Test pointer", &value)
+		})
+	})
+	t.Run("should use given name in panic message", func(t *testing.T) {
+		assert.PanicsWithValue(t, "assertion failed: Other pointer should be a nil pointer", func() {
+			value := 42
+			NilPtr("Other pointer", &value)
+		})
+	})
+}
+
+func TestNotNilPtr(t *testing.T) {
+	t.Run("should accept not-nil pointer & return same pointer", func(t *testing.T) {
+		value := 42
+		assert.Same(t, &value, NotNilPtr("Test pointer", &value))
+	})
+	t.Run("should panic when pointer is nil", func(t *testing.T) {
+		assert.PanicsWithValue(t, "assertion failed: Test pointer should not be a nil pointer", func() {
+			var nilPtr *string
+			NotNilPtr("Test pointer", nilPtr)
+		})
+	})
+	t.Run("should use given name in panic message", func(t *testing.T) {
+		assert.PanicsWithValue(t, "assertion failed: Other pointer should not be a nil pointer", func() {
+			var nilPtr *float64
+			NotNilPtr("Other pointer", nilPtr)
+		})
+	})
+}
+
+func BenchmarkNilPtr(b *testing.B) {
+	var nilPtr *int
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		NilPtr("Benchmark pointer", nilPtr)
+	}
+}
+
+func BenchmarkNotNilPtr(b *testing.B) {
+	value := "benchmark"
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		NotNilPtr("Benchmark pointer", &value)
+	}
+}