test: add tests for inline highlighting

tests/init_spec.lua

@@ -0,0 +1,84 @@
+local live_command = require("live-command")
+
+describe("inline_highlights", function()
+  -- Checks for the case when the end of the line was unchanged
+  it("single insertion", function()
+    local highlights = {}
+    local updated_lines = { "new word" }
+    live_command._add_inline_highlights(1, { "word" }, updated_lines, true, highlights)
+
+    assert.are_same({
+      { kind = "insertion", line = 1, column = 1, length = 4 },
+    }, highlights)
+    assert.are_same({ "new word" }, updated_lines)
+  end)
+
+  it("insertions 1", function()
+    local highlights = {}
+    local updated_lines = { "new word new" }
+    live_command._add_inline_highlights(1, { "word" }, updated_lines, true, highlights)
+
+    assert.are_same({
+      { kind = "insertion", line = 1, column = 1, length = 4 },
+      { kind = "insertion", line = 1, column = 9, length = 4 },
+    }, highlights)
+    assert.are_same({ "new word new" }, updated_lines)
+  end)
+
+  it("insertions 2", function()
+    local highlights = {}
+    local updated_lines = { "new word new" }
+    live_command._add_inline_highlights(1, { "word" }, updated_lines, true, highlights)
+
+    assert.are_same({
+      { kind = "insertion", line = 1, column = 1, length = 4 },
+      { kind = "insertion", line = 1, column = 9, length = 4 },
+    }, highlights)
+    assert.are_same({ "new word new" }, updated_lines)
+  end)
+
+  it("insertions + deletion", function()
+    local highlights = {}
+    local updated_lines = { "test1" }
+    live_command._add_inline_highlights(1, { "a test" }, updated_lines, true, highlights)
+
+    assert.are_same({
+      { kind = "deletion", line = 1, column = 1, length = 2 },
+      { kind = "insertion", line = 1, column = 7, length = 1 },
+    }, highlights)
+    assert.are_same({ "a test1" }, updated_lines)
+  end)
+
+  it("change", function()
+    local highlights = {}
+    local updated_lines = { "      x.insert" }
+    live_command._add_inline_highlights(1, { "      table.insert" }, updated_lines, true, highlights)
+
+    assert.are_same({
+      { kind = "change", line = 1, column = 7, length = 1 },
+    }, highlights)
+    assert.are_same({ "      x.insert" }, updated_lines)
+  end)
+
+  it("change + deletion", function()
+    local highlights = {}
+    local updated_lines = { "lel" }
+    live_command._add_inline_highlights(1, { "-- require plugins.nvim-surround" }, updated_lines, true, highlights)
+    assert.are_same({
+      { kind = "change", line = 1, column = 1, length = 1 },
+      { kind = "deletion", line = 1, column = 3, length = 2 },
+      { kind = "deletion", line = 1, column = 6, length = 19 },
+    }, highlights)
+    assert.are_same({"le plugins.nvim-surround"}, updated_lines)
+  end)
+
+  it("deletion", function()
+    local highlights = {}
+    local updated_lines = { "local s" }
+    live_command._add_inline_highlights(1, { "local tests" }, updated_lines, true, highlights)
+    assert.are_same({
+      { kind = "deletion", line = 1, column = 7, length = 4 },
+    }, highlights)
+    assert.are_same({ "local tests" }, updated_lines)
+  end)
+end)