mirror of
https://github.com/danog/liquid.git
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139 lines
2.7 KiB
Go
139 lines
2.7 KiB
Go
package expressions
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import (
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"fmt"
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"strings"
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"testing"
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"github.com/stretchr/testify/require"
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)
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var evaluatorTests = []struct {
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in string
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expected interface{}
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}{
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// Literals
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{`12`, 12},
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{`12.3`, 12.3},
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{`true`, true},
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{`false`, false},
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{`'abc'`, "abc"},
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{`"abc"`, "abc"},
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// Variables
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{`n`, 123},
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// Attributes
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{`obj.a`, "first"},
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{`obj.b.c`, "d"},
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{`obj.x`, nil},
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{`fruits.first`, "apples"},
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{`fruits.last`, "plums"},
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{`empty_list.first`, nil},
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{`empty_list.last`, nil},
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{`"abc".size`, 3},
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{`fruits.size`, 4},
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// Indices
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{`array[1]`, "second"},
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{`array[-1]`, "third"}, // undocumented
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{`array[100]`, nil},
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{`obj[1]`, nil},
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{`obj.c[0]`, "r"},
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// Expressions
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{`(n)`, 123},
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// Operators
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{`1 == 1`, true},
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{`1 == 2`, false},
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{`1.0 == 1.0`, true},
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{`1.0 == 2.0`, false},
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{`1.0 == 1`, true},
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{`1 == 1.0`, true},
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{`"a" == "a"`, true},
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{`"a" == "b"`, false},
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{`1 != 1`, false},
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{`1 != 2`, true},
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{`1.0 != 1.0`, false},
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{`1 != 1.0`, false},
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{`1 != 2.0`, true},
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{`1 < 2`, true},
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{`2 < 1`, false},
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{`1.0 < 2.0`, true},
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{`1.0 < 2`, true},
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{`1 < 2.0`, true},
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{`1.0 < 2`, true},
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{`"a" < "a"`, false},
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{`"a" < "b"`, true},
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{`"b" < "a"`, false},
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{`1 > 2`, false},
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{`2 > 1`, true},
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{`1 <= 1`, true},
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{`1 <= 2`, true},
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{`2 <= 1`, false},
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{`"a" <= "a"`, true},
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{`"a" <= "b"`, true},
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{`"b" <= "a"`, false},
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{`1 >= 1`, true},
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{`1 >= 2`, false},
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{`2 >= 1`, true},
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{`true and false`, false},
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{`true and true`, true},
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{`true and true and true`, true},
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{`false or false`, false},
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{`false or true`, true},
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{`"seafood" contains "foo"`, true},
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{`"seafood" contains "bar"`, false},
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{`array contains "first"`, true},
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{`"foo" contains "missing"`, false},
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// filters
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{`"seafood" | length`, 8},
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}
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var evaluatorTestBindings = (map[string]interface{}{
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"n": 123,
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"array": []string{"first", "second", "third"},
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"empty_list": []interface{}{},
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"fruits": []string{"apples", "oranges", "peaches", "plums"},
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"obj": map[string]interface{}{
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"a": "first",
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"b": map[string]interface{}{"c": "d"},
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"c": []string{"r", "g", "b"},
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},
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})
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func TestEvaluator(t *testing.T) {
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settings := NewSettings()
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settings.AddFilter("length", strings.Count)
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context := NewContext(evaluatorTestBindings, settings)
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for i, test := range evaluatorTests {
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t.Run(fmt.Sprint(i), func(t *testing.T) {
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val, err := EvaluateString(test.in, context)
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require.NoErrorf(t, err, test.in)
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require.Equalf(t, test.expected, val, test.in)
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})
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}
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}
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func TestHelpers(t *testing.T) {
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context := NewContext(map[string]interface{}{}, NewSettings())
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k := Constant(10)
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v, err := k.Evaluate(context)
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require.NoError(t, err)
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require.Equal(t, 10, v)
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v, err = Not(k).Evaluate(context)
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require.NoError(t, err)
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require.Equal(t, false, v)
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}
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