File: constraint_test.go

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package version

import (
	"testing"
)

func TestNewConstraint(t *testing.T) {
	cases := []struct {
		input string
		count int
		err   bool
	}{
		{">= 1.2", 1, false},
		{"1.0", 1, false},
		{">= 1.x", 0, true},
		{">= 1.2, < 1.0", 2, false},

		// Out of bounds
		{"11387778780781445675529500000000000000000", 0, true},
	}

	for _, tc := range cases {
		v, err := NewConstraint(tc.input)
		if tc.err && err == nil {
			t.Fatalf("expected error for input: %s", tc.input)
		} else if !tc.err && err != nil {
			t.Fatalf("error for input %s: %s", tc.input, err)
		}

		if len(v) != tc.count {
			t.Fatalf("input: %s\nexpected len: %d\nactual: %d",
				tc.input, tc.count, len(v))
		}
	}
}

func TestConstraintCheck(t *testing.T) {
	cases := []struct {
		constraint string
		version    string
		check      bool
	}{
		{">= 1.0, < 1.2", "1.1.5", true},
		{"< 1.0, < 1.2", "1.1.5", false},
		{"= 1.0", "1.1.5", false},
		{"= 1.0", "1.0.0", true},
		{"1.0", "1.0.0", true},
		{"~> 1.0", "2.0", false},
		{"~> 1.0", "1.1", true},
		{"~> 1.0", "1.2.3", true},
		{"~> 1.0.0", "1.2.3", false},
		{"~> 1.0.0", "1.0.7", true},
		{"~> 1.0.0", "1.1.0", false},
		{"~> 1.0.7", "1.0.4", false},
		{"~> 1.0.7", "1.0.7", true},
		{"~> 1.0.7", "1.0.8", true},
		{"~> 1.0.7", "1.0.7.5", true},
		{"~> 1.0.7", "1.0.6.99", false},
		{"~> 1.0.7", "1.0.8.0", true},
		{"~> 1.0.9.5", "1.0.9.5", true},
		{"~> 1.0.9.5", "1.0.9.4", false},
		{"~> 1.0.9.5", "1.0.9.6", true},
		{"~> 1.0.9.5", "1.0.9.5.0", true},
		{"~> 1.0.9.5", "1.0.9.5.1", true},
		{"~> 2.0", "2.1.0-beta", false},
		{"~> 2.1.0-a", "2.2.0", false},
		{"~> 2.1.0-a", "2.1.0", false},
		{"~> 2.1.0-a", "2.1.0-beta", true},
		{"~> 2.1.0-a", "2.2.0-alpha", false},
		{"> 2.0", "2.1.0-beta", false},
		{">= 2.1.0-a", "2.1.0-beta", true},
		{">= 2.1.0-a", "2.1.1-beta", false},
		{">= 2.0.0", "2.1.0-beta", false},
		{">= 2.1.0-a", "2.1.1", true},
		{">= 2.1.0-a", "2.1.1-beta", false},
		{">= 2.1.0-a", "2.1.0", true},
		{"<= 2.1.0-a", "2.0.0", true},
	}

	for _, tc := range cases {
		c, err := NewConstraint(tc.constraint)
		if err != nil {
			t.Fatalf("err: %s", err)
		}

		v, err := NewVersion(tc.version)
		if err != nil {
			t.Fatalf("err: %s", err)
		}

		actual := c.Check(v)
		expected := tc.check
		if actual != expected {
			t.Fatalf("Version: %s\nConstraint: %s\nExpected: %#v",
				tc.version, tc.constraint, expected)
		}
	}
}

func TestConstraintsString(t *testing.T) {
	cases := []struct {
		constraint string
		result     string
	}{
		{">= 1.0, < 1.2", ""},
		{"~> 1.0.7", ""},
	}

	for _, tc := range cases {
		c, err := NewConstraint(tc.constraint)
		if err != nil {
			t.Fatalf("err: %s", err)
		}

		actual := c.String()
		expected := tc.result
		if expected == "" {
			expected = tc.constraint
		}

		if actual != expected {
			t.Fatalf("Constraint: %s\nExpected: %#v\nActual: %s",
				tc.constraint, expected, actual)
		}
	}
}