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140 lines
4.2 KiB
140 lines
4.2 KiB
# Miscellaneous tests of Starlark evaluation.
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# This is a "chunked" file: each "---" effectively starts a new file.
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# TODO(adonovan): move these tests into more appropriate files.
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# TODO(adonovan): test coverage:
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# - stmts: pass; if cond fail; += and failures;
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# for x fail; for x not iterable; for can't assign; for
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# error in loop body
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# - subassign fail
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# - x[i]=x fail in both operands; frozen x; list index not int; boundscheck
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# - x.f = ...
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# - failure in list expr [...]; tuple expr; dict expr (bad key)
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# - cond expr semantics; failures
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# - x[i] failures in both args; dict and iterator key and range checks;
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# unhandled operand types
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# - +: list/list, int/int, string/string, tuple+tuple, dict/dict;
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# - * and ** calls: various errors
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# - call of non-function
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# - slice x[ijk]
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# - comprehension: unhashable dict key;
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# scope of vars (local and toplevel); noniterable for clause
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# - unknown unary op
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# - ordering of values
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# - freeze, transitivity of its effect.
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# - add an application-defined type to the environment so we can test it.
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# - even more:
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#
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# eval
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# pass statement
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# assign to tuple l-value -- illegal
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# assign to list l-value -- illegal
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# assign to field
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# tuple + tuple
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# call with *args, **kwargs
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# slice with step
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# tuple slice
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# interpolate with %c, %%
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load("assert.star", "assert")
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# Ordered comparisons require values of the same type.
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assert.fails(lambda: None < None, "not impl")
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assert.fails(lambda: None < False, "not impl")
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assert.fails(lambda: False < list, "not impl")
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assert.fails(lambda: list < {}, "not impl")
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assert.fails(lambda: {} < (lambda: None), "not impl")
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assert.fails(lambda: (lambda: None) < 0, "not impl")
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assert.fails(lambda: 0 < [], "not impl")
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assert.fails(lambda: [] < "", "not impl")
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assert.fails(lambda: "" < (), "not impl")
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# Except int < float:
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assert.lt(1, 2.0)
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assert.lt(2.0, 3)
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---
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# cyclic data structures
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load("assert.star", "assert")
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cyclic = [1, 2, 3] # list cycle
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cyclic[1] = cyclic
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assert.eq(str(cyclic), "[1, [...], 3]")
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assert.fails(lambda: cyclic < cyclic, "maximum recursion")
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assert.fails(lambda: cyclic == cyclic, "maximum recursion")
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cyclic2 = [1, 2, 3]
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cyclic2[1] = cyclic2
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assert.fails(lambda: cyclic2 == cyclic, "maximum recursion")
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cyclic3 = [1, [2, 3]] # list-list cycle
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cyclic3[1][0] = cyclic3
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assert.eq(str(cyclic3), "[1, [[...], 3]]")
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cyclic4 = {"x": 1}
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cyclic4["x"] = cyclic4
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assert.eq(str(cyclic4), "{\"x\": {...}}")
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cyclic5 = [0, {"x": 1}] # list-dict cycle
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cyclic5[1]["x"] = cyclic5
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assert.eq(str(cyclic5), "[0, {\"x\": [...]}]")
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assert.eq(str(cyclic5), "[0, {\"x\": [...]}]")
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assert.fails(lambda: cyclic5 == cyclic5 ,"maximum recursion")
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cyclic6 = [0, {"x": 1}]
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cyclic6[1]["x"] = cyclic6
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assert.fails(lambda: cyclic5 == cyclic6, "maximum recursion")
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---
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# regression
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load("assert.star", "assert")
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# was a parse error:
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assert.eq(("ababab"[2:]).replace("b", "c"), "acac")
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assert.eq("ababab"[2:].replace("b", "c"), "acac")
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# test parsing of line continuation, at toplevel and in expression.
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three = 1 + \
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2
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assert.eq(1 + \
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2, three)
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---
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# A regression test for error position information.
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_ = {}.get(1, default=2) ### "get: unexpected keyword arguments"
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---
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# Load exposes explicitly declared globals from other modules.
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load('assert.star', 'assert', 'freeze')
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assert.eq(str(freeze), '<built-in function freeze>')
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---
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# Load does not expose pre-declared globals from other modules.
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# See github.com/google/skylark/issues/75.
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load('assert.star', 'assert', 'matches') ### "matches not found in module"
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---
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# Load does not expose universals accessible in other modules.
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load('assert.star', 'len') ### "len not found in module"
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---
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# Test plus folding optimization.
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load('assert.star', 'assert')
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s = "s"
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l = [4]
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t = (4,)
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assert.eq("a" + "b" + "c", "abc")
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assert.eq("a" + "b" + s + "c", "absc")
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assert.eq(() + (1,) + (2, 3), (1, 2, 3))
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assert.eq(() + (1,) + t + (2, 3), (1, 4, 2, 3))
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assert.eq([] + [1] + [2, 3], [1, 2, 3])
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assert.eq([] + [1] + l + [2, 3], [1, 4, 2, 3])
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assert.fails(lambda: "a" + "b" + 1 + "c", "unknown binary op: string \\+ int")
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assert.fails(lambda: () + () + 1 + (), "unknown binary op: tuple \\+ int")
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assert.fails(lambda: [] + [] + 1 + [], "unknown binary op: list \\+ int")
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---
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load('assert.star', 'froze') ### `name froze not found .*did you mean freeze`
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