Add inline variable parsing test as well

Author: YingboMa

test/variable_parsing.jl

@@ -92,6 +92,13 @@ end
 @test getmetadata(x, VariableUnit) == u
 @test getmetadata(y, VariableDefaultValue) === 2
 
+@variables x=[1, 2] [connect = Flow, unit = u] y=2
+
+@test getmetadata(x, VariableDefaultValue) == [1, 2]
+@test getmetadata(x, VariableConnectType) == Flow
+@test getmetadata(x, VariableUnit) == u
+@test getmetadata(y, VariableDefaultValue) === 2
+
 @variables begin
     x, [connect = Flow, unit = u]
     y = 2, [connect = Flow]