git.s-ol.nu alive / 57ce447
builtins: test def, use, export, export* s-ol 3 months ago
1 changed file(s) with 153 addition(s) and 0 deletion(s). Raw diff Collapse all Expand all
+153
-0
spec/lib/builtins/scopes_spec.moon less more
0 import TestPilot from require 'spec.test_setup'
1 import T, Constant, Scope from require 'alv'
2
3 describe "def", ->
4 COPILOT = TestPilot!
5
6 it "returns nothing", ->
7 with COPILOT\eval_once '(def _ 3)'
8 assert.is.true \is_const!
9 assert.is.nil .result
10
11 it "passes through side-effects", ->
12 with COPILOT\eval_once '
13 (import* time)
14 (def nonconst (every 0.5 "bang!"))'
15 assert.is.false \is_const!
16 assert.is.nil .result
17 assert.is.equal T.clock, (next .children[2].side_inputs).type
18
19 it "validates args", ->
20 err = assert.has.error -> COPILOT\eval_once '(def)'
21 assert.matches "requires at least 2 arguments", err
22
23 err = assert.has.error -> COPILOT\eval_once '(def a)'
24 assert.matches "requires at least 2 arguments", err
25
26 err = assert.has.error -> COPILOT\eval_once '(def a 1 b)'
27 assert.matches "requires an even number of arguments", err
28
29 err = assert.has.error -> COPILOT\eval_once '(def (+ 1 2) 3)'
30 assert.matches "name is not a symbol", err
31
32 it "cannot redefine symbols", ->
33 err = assert.has.error -> COPILOT\eval_once '
34 (def a 1
35 a 2)'
36 assert.matches "cannot redefine symbol", err
37
38 it "can hide symbols", ->
39 with COPILOT\eval_once '
40 (def a 1)
41 (do
42 (def a 2)
43 a)
44 a'
45 assert.is.true \is_const!
46 assert.is.equal (Constant.num 1), .result
47 assert.is.equal (Constant.num 2), .children[2].result
48
49 describe "export", ->
50 COPILOT = TestPilot!
51
52 it "returns a scope containing new defs", ->
53 with COPILOT\eval_once '(export)'
54 assert.is.true \is_const!
55 assert.is.equal T.scope, .result.type
56 assert.is.same {}, .result!.values
57
58 with COPILOT\eval_once '(export (def a 1 b 2))'
59 assert.is.true \is_const!
60 assert.is.equal T.scope, .result.type
61 assert.is.equal (Constant.num 1), .result!.values.a.result
62 assert.is.equal (Constant.num 2), .result!.values.b.result
63
64 it "passes through side-effects", ->
65 with COPILOT\eval_once '
66 (import* time)
67 (export
68 (def hello (every 0.5 "bang!"))
69 (every 0.5 42))'
70 assert.is.false \is_const!
71 assert.is.equal T.scope, .result.type
72 a = next .children[2].children[1].side_inputs
73 b = next .children[2].children[2].side_inputs
74 assert.is.truthy .side_inputs[a]
75 assert.is.truthy .side_inputs[b]
76
77 it "doesn't mutate the current scope", ->
78 with COPILOT\eval_once '
79 (def a 1)
80 (export
81 (def a 5)
82 (def b 2))
83 (export*)'
84 assert.is.true \is_const!
85 assert.is.equal T.scope, .result.type
86 assert.is.equal (Constant.num 1), .result!.values.a.result
87 assert.is.nil .result!.values.b
88
89 describe "export*", ->
90 COPILOT = TestPilot!
91
92 it "validates args", ->
93 err = assert.has.error -> COPILOT\eval_once '(export* (+ 1 2))'
94 assert.matches "arguments need to be symbols", err
95
96 err = assert.has.error -> COPILOT\eval_once '(export* 3)'
97 assert.matches "is not a sym", err
98
99 err = assert.has.error -> COPILOT\eval_once '(export* a)'
100 assert.matches "undefined symbol", err
101
102 describe "without args", ->
103 it "returns a scope containing all local defs", ->
104 with COPILOT\eval_once '(export*)'
105 assert.is.true \is_const!
106 assert.is.equal T.scope, .result.type
107 assert.is.same {}, .result!.values
108
109 with COPILOT\eval_once '
110 (def a 1 b "hello" c 3)
111 (export*)'
112 assert.is.true \is_const!
113 assert.is.equal T.scope, .result.type
114 assert.is.equal (Constant.num 1), .result!.values.a.result
115 assert.is.equal (Constant.str 'hello'), .result!.values.b.result
116 assert.is.equal (Constant.num 3), .result!.values.c.result
117
118 describe "with args", ->
119 it "returns a scope containing those defs", ->
120 with COPILOT\eval_once '
121 (def a 1 b "hello" c 3)
122 (export* a b)'
123 assert.is.true \is_const!
124 assert.is.equal T.scope, .result.type
125 assert.is.equal (Constant.num 1), .result!.values.a.result
126 assert.is.equal (Constant.str 'hello'), .result!.values.b.result
127 assert.is.nil .result!.values.c
128
129 describe "use", ->
130 COPILOT = TestPilot!
131
132 it "returns nothing", ->
133 with COPILOT\eval_once '(use (export))'
134 assert.is.true \is_const!
135 assert.is.nil .result
136
137 it "updates the current scope", ->
138 with COPILOT\eval_once '
139 (use (export
140 (def a 2)))
141 a'
142 assert.is.true \is_const!
143 assert.is.equal (Constant.num 2), .result
144
145 it "terms and conditions apply", ->
146 err = assert.has.error -> COPILOT\eval_once '
147 (def a 1)
148 (use
149 (export
150 (def a 5)
151 (def b 2)))'
152 assert.matches "cannot redefine symbol", err