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constraint_test.go
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109 lines (104 loc) · 2.55 KB
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package depgraph_test
import (
"go/build/constraint"
"testing"
"github.com/luno/jettison/jtest"
"github.com/stretchr/testify/require"
)
// TestBuildConstraints demonstrates how the constraint package can be used to
// parse build tags.
func TestBuildConstraints(t *testing.T) {
testCases := []struct {
name string
sourceTags string
providedTags []string
exp bool
}{
{
name: "simple case, tag not provided",
sourceTags: "//go:build foo",
providedTags: nil,
exp: false,
},
{
name: "simple case, tag provided",
sourceTags: "//go:build foo",
providedTags: []string{"foo"},
exp: true,
},
{
name: "and case, neither provided",
sourceTags: "//go:build foo && bar",
providedTags: nil,
exp: false,
},
{
name: "and case, one provided",
sourceTags: "//go:build foo && bar",
providedTags: []string{"foo"},
exp: false,
},
{
name: "and case, both provided",
sourceTags: "//go:build foo && bar",
providedTags: []string{"foo", "bar"},
exp: true,
},
{
name: "or case, neither provided",
sourceTags: "//go:build foo || bar",
providedTags: nil,
exp: false,
},
{
name: "or case, one provided",
sourceTags: "//go:build foo || bar",
providedTags: []string{"bar"},
exp: true,
},
{
name: "or case, both provided",
sourceTags: "//go:build foo || bar",
providedTags: []string{"foo", "bar"},
exp: true,
},
{
name: "not case, not provided",
sourceTags: "//go:build !foo",
providedTags: nil,
exp: true,
},
{
name: "not case, provided",
sourceTags: "//go:build !foo",
providedTags: []string{"foo"},
exp: false,
},
{
name: "more complex case",
sourceTags: "//go:build (!foo && bar) || (foo && baz)",
providedTags: []string{"foo", "bar"},
exp: false,
},
{
name: "more complex case",
sourceTags: "//go:build (!foo && bar) || (foo && baz)",
providedTags: []string{"foo", "baz"},
exp: true,
},
}
for _, testCase := range testCases {
t.Run(testCase.name, func(t *testing.T) {
c, err := constraint.Parse(testCase.sourceTags)
jtest.RequireNil(t, err)
tagMap := make(map[string]bool)
for _, tag := range testCase.providedTags {
tagMap[tag] = true
}
act := c.Eval(func(tag string) bool {
return tagMap[tag]
})
require.Equal(t, testCase.exp, act)
})
}
}