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7788f09567
This PR creates a pointer.Compare helper for comparing equality of two pointers. Strictly only works with primitive types we know are safe to derefence and compare using '=='.
68 lines
1.1 KiB
Go
68 lines
1.1 KiB
Go
package pointer
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import (
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"testing"
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"time"
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"github.com/shoenig/test/must"
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)
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func Test_Of(t *testing.T) {
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s := "hello"
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sPtr := Of(s)
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must.Eq(t, s, *sPtr)
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b := "bye"
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sPtr = &b
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must.NotEq(t, s, *sPtr)
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}
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func Test_Copy(t *testing.T) {
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orig := Of(1)
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dup := Copy(orig)
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orig = Of(7)
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must.EqOp(t, 7, *orig)
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must.EqOp(t, 1, *dup)
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}
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func Test_Compare(t *testing.T) {
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t.Run("int", func(t *testing.T) {
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a := 1
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b := 2
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c := 1
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var n *int // nil
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must.False(t, Eq(&a, &b))
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must.True(t, Eq(&a, &c))
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must.False(t, Eq(nil, &a))
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must.False(t, Eq(n, &a))
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must.True(t, Eq(n, nil))
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})
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t.Run("string", func(t *testing.T) {
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a := "cat"
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b := "dog"
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c := "cat"
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var n *string
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must.False(t, Eq(&a, &b))
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must.True(t, Eq(&a, &c))
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must.False(t, Eq(nil, &a))
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must.False(t, Eq(n, &a))
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must.True(t, Eq(n, nil))
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})
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t.Run("duration", func(t *testing.T) {
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a := time.Duration(1)
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b := time.Duration(2)
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c := time.Duration(1)
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var n *time.Duration
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must.False(t, Eq(&a, &b))
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must.True(t, Eq(&a, &c))
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must.False(t, Eq(nil, &a))
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must.False(t, Eq(n, &a))
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must.True(t, Eq(n, nil))
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})
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}
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