Add initial tests for Julia language indentation

tests/indent/julia/argument_list.jl

@@ -0,0 +1,13 @@
+function test(a::Number,
+              b::Float64,
+              c::Union{Float64, Integer},
+              d::Bool)
+end
+
+function test(
+    a::Number,
+    b::Float64,
+    c::Union{Float64, Integer},
+    d::Bool
+)
+end

tests/indent/julia/assignment.jl

@@ -0,0 +1,11 @@
+my_variable =
+    1 + 2 - 3 *
+    4 / 5 %
+    6
+
+function test()
+    my_variable =
+        1 + 2 - 3 *
+        4 / 5 %
+        6
+end

tests/indent/julia/parameter_list.jl

@@ -0,0 +1,15 @@
+function test(a, b, c, d, e)
+    vcat(a,
+         b,
+         c,
+         d,
+         e)
+
+    vcat(
+        a,
+        b,
+        c,
+        d,
+        e
+    )
+end

tests/indent/julia_spec.lua

@@ -0,0 +1,17 @@
+local Runner = require("tests.indent.common").Runner
+local XFAIL = require("tests.indent.common").XFAIL
+
+local run = Runner:new(it, "tests/indent/julia", {
+  tabstop = 4,
+  shiftwidth = 4,
+  softtabstop = 4,
+  expandtab = true,
+})
+
+describe("indent Julia:", function()
+  describe("whole file:", function()
+    run:whole_file(".", {
+      expected_failures = {},
+    })
+  end)
+end)