node_test.go

Documentation: cuelang.org/go/cue/format

     1  // Copyright 2019 CUE Authors
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  package format
    16  
    17  import (
    18  	"strings"
    19  	"testing"
    20  
    21  	"cuelang.org/go/cue/ast"
    22  	"cuelang.org/go/cue/token"
    23  	"cuelang.org/go/internal"
    24  )
    25  
    26  // TestInvalidAST verifies behavior for various invalid AST inputs. In some
    27  // cases it is okay to be permissive, as long as the output is correct.
    28  func TestInvalidAST(t *testing.T) {
    29  	ident := func(s string) *ast.Ident {
    30  		return &ast.Ident{NamePos: token.NoSpace.Pos(), Name: s}
    31  	}
    32  	testCases := []struct {
    33  		desc string
    34  		node ast.Node
    35  		out  string
    36  	}{{
    37  		desc: "label sequence for definition",
    38  		node: &ast.Field{Label: ident("foo"), Value: ast.NewStruct(
    39  			ident("#bar"), token.COLON, &ast.StructLit{},
    40  		)},
    41  		// Force a new struct.
    42  		out: `foo: {
    43  	#bar: {}
    44  }`,
    45  	}, {
    46  		desc: "label with invalid identifier",
    47  		node: &ast.Field{Label: &ast.Ident{}, Value: ast.NewString("foo")},
    48  		// Force a new struct.
    49  		out: `"": "foo"`,
    50  	}, {
    51  		desc: "ImportDecl without parens, but imports with comments",
    52  		node: func() ast.Node {
    53  			n := ast.NewImport(nil, "time")
    54  			ast.AddComment(n, internal.NewComment(true, "hello"))
    55  			return &ast.ImportDecl{Specs: []*ast.ImportSpec{n}}
    56  		}(),
    57  		out: `import (
    58  	// hello
    59  	"time"
    60  )`,
    61  	}}
    62  	for _, tc := range testCases {
    63  		t.Run(tc.desc, func(t *testing.T) {
    64  			b, err := Node(tc.node)
    65  			if err != nil {
    66  				t.Fatal(err)
    67  			}
    68  			got := string(b)
    69  			want := tc.out
    70  			if got != want {
    71  				t.Errorf("\ngot  %v;\nwant %v", got, want)
    72  			}
    73  		})
    74  	}
    75  }
    76  
    77  func TestErrors(t *testing.T) {
    78  	testCases := []struct {
    79  		desc string
    80  		node ast.Node
    81  		err  string
    82  	}{{
    83  		desc: "empty identifier",
    84  		node: ast.NewIdent(""),
    85  		err:  "invalid identifier",
    86  	}}
    87  	for _, tc := range testCases {
    88  		t.Run(tc.desc, func(t *testing.T) {
    89  			b, err := Node(tc.node)
    90  			if err == nil {
    91  				t.Fatalf("expected error, found %q", b)
    92  			}
    93  			got := err.Error()
    94  			if !strings.Contains(got, tc.err) {
    95  				t.Errorf("\ngot  %v;\nwant %v", got, tc.err)
    96  			}
    97  		})
    98  	}
    99  }
   100
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