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describe "string interpolation", ->
it "should interpolate in double quotes", ->
name = "World"
result = "Hello #{name}!"
assert.same result, "Hello World!"
it "should interpolate numbers", ->
a, b = 10, 20
result = "#{a} + #{b} = #{a + b}"
assert.same result, "10 + 20 = 30"
it "should interpolate expressions", ->
x = 5
result = "x * 2 = #{x * 2}"
assert.same result, "x * 2 = 10"
it "should interpolate function calls", ->
result = "result: #{math.floor 5.5}"
assert.same result, "result: 5"
it "should interpolate in string literals", ->
x = 100
result = "Value: #{x}"
assert.same result, "Value: 100"
it "should work with nested interpolation", ->
inner = "inner"
result = "Outer: #{inner}"
assert.same result, "Outer: inner"
it "should not interpolate in single quotes", ->
name = "World"
result = 'Hello #{name}!'
assert.same result, 'Hello #{name}!'
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