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Merge pull request #249 from ichiban/refine-terms
refine Term
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -1,113 +1,2 @@ | ||
| package engine | ||
|
|
||
| import ( | ||
| "bytes" | ||
| "testing" | ||
|
|
||
| "github.com/stretchr/testify/assert" | ||
| ) | ||
|
|
||
| func TestAtom_Unify(t *testing.T) { | ||
| unit := Atom("foo") | ||
|
|
||
| t.Run("atom", func(t *testing.T) { | ||
| env, ok := unit.Unify(Atom("foo"), false, nil) | ||
| assert.True(t, ok) | ||
| assert.Nil(t, env) | ||
|
|
||
| env, ok = unit.Unify(Atom("bar"), false, env) | ||
| assert.False(t, ok) | ||
| assert.Nil(t, env) | ||
| }) | ||
|
|
||
| t.Run("integer", func(t *testing.T) { | ||
| env, ok := unit.Unify(Integer(1), false, nil) | ||
| assert.False(t, ok) | ||
| assert.Nil(t, env) | ||
| }) | ||
|
|
||
| t.Run("variable", func(t *testing.T) { | ||
| t.Run("free", func(t *testing.T) { | ||
| v := Variable("X") | ||
|
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| env, ok := unit.Unify(v, false, nil) | ||
| assert.True(t, ok) | ||
| assert.Equal(t, unit, env.Resolve(v)) | ||
| }) | ||
| t.Run("bound to the same value", func(t *testing.T) { | ||
| v := Variable("X") | ||
| env := NewEnv(). | ||
| Bind(v, unit) | ||
| env, ok := unit.Unify(v, false, env) | ||
| assert.True(t, ok) | ||
| assert.Equal(t, unit, env.Resolve(v)) | ||
| }) | ||
| t.Run("bound to a different value", func(t *testing.T) { | ||
| v := Variable("X") | ||
| env := NewEnv(). | ||
| Bind(v, Atom("bar")) | ||
| _, ok := unit.Unify(v, false, env) | ||
| assert.False(t, ok) | ||
| }) | ||
| }) | ||
|
|
||
| t.Run("compound", func(t *testing.T) { | ||
| env, ok := unit.Unify(&Compound{ | ||
| Functor: "foo", | ||
| Args: []Term{Atom("foo")}, | ||
| }, false, nil) | ||
| assert.False(t, ok) | ||
| assert.Nil(t, env) | ||
| }) | ||
| } | ||
|
|
||
| func TestAtom_WriteTerm(t *testing.T) { | ||
| tests := []struct { | ||
| atom Atom | ||
| opts WriteOptions | ||
| output string | ||
| }{ | ||
| {atom: `a`, opts: WriteOptions{Quoted: false}, output: `a`}, | ||
| {atom: `a`, opts: WriteOptions{Quoted: true}, output: `a`}, | ||
| {atom: "\a\b\f\n\r\t\v\x00\\'\"`", opts: WriteOptions{Quoted: false}, output: "\a\b\f\n\r\t\v\x00\\'\"`"}, | ||
| {atom: "\a\b\f\n\r\t\v\x00\\'\"`", opts: WriteOptions{Quoted: true}, output: "'\\a\\b\\f\\n\\r\\t\\v\\x0\\\\\\\\'\"`'"}, | ||
| {atom: `,`, opts: WriteOptions{Quoted: false}, output: `,`}, | ||
| {atom: `,`, opts: WriteOptions{Quoted: true}, output: `','`}, | ||
| {atom: `[]`, opts: WriteOptions{Quoted: false}, output: `[]`}, | ||
| {atom: `[]`, opts: WriteOptions{Quoted: true}, output: `[]`}, | ||
| {atom: `{}`, opts: WriteOptions{Quoted: false}, output: `{}`}, | ||
| {atom: `{}`, opts: WriteOptions{Quoted: true}, output: `{}`}, | ||
|
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| {atom: `-`, output: `-`}, | ||
| {atom: `-`, opts: WriteOptions{ops: operators{"+": {}, "-": {}}, left: operator{specifier: operatorSpecifierFY, name: "+"}}, output: ` (-)`}, | ||
| {atom: `-`, opts: WriteOptions{ops: operators{"+": {}, "-": {}}, right: operator{name: "+"}}, output: `(-)`}, | ||
|
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| {atom: `X`, opts: WriteOptions{Quoted: true, left: operator{name: `F`}}, output: ` 'X'`}, // So that it won't be 'F''X'. | ||
| {atom: `X`, opts: WriteOptions{Quoted: true, right: operator{name: `F`}}, output: `'X' `}, // So that it won't be 'X''F'. | ||
|
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| {atom: `foo`, opts: WriteOptions{left: operator{name: `bar`}}, output: ` foo`}, // So that it won't be barfoo. | ||
| {atom: `foo`, opts: WriteOptions{right: operator{name: `bar`}}, output: `foo `}, // So that it won't be foobar. | ||
| } | ||
|
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| var buf bytes.Buffer | ||
| for _, tt := range tests { | ||
| t.Run(string(tt.atom), func(t *testing.T) { | ||
| buf.Reset() | ||
| assert.NoError(t, tt.atom.WriteTerm(&buf, &tt.opts, nil)) | ||
| assert.Equal(t, tt.output, buf.String()) | ||
| }) | ||
| } | ||
| } | ||
|
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| func TestAtom_Compare(t *testing.T) { | ||
| var m mockTerm | ||
| defer m.AssertExpectations(t) | ||
|
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| assert.Equal(t, int64(-1), Atom("a").Compare(&m, nil)) | ||
| assert.Equal(t, int64(-1), Atom("a").Compare(Atom("b"), nil)) | ||
| assert.Equal(t, int64(0), Atom("a").Compare(Atom("a"), nil)) | ||
| assert.Equal(t, int64(1), Atom("b").Compare(Atom("a"), nil)) | ||
| assert.Equal(t, int64(1), Atom("a").Compare(Variable("X"), nil)) | ||
| assert.Equal(t, int64(1), Atom("a").Compare(Float(0), nil)) | ||
| assert.Equal(t, int64(1), Atom("a").Compare(Integer(0), nil)) | ||
| } |
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