feat(test): testing infrastructure

spec/init_spec.lua

@@ -0,0 +1,144 @@
+require('spec.helpers')
+local fugitive_ts = require('fugitive-ts')
+
+describe('fugitive-ts', function()
+  describe('setup', function()
+    it('accepts empty config', function()
+      assert.has_no.errors(function()
+        fugitive_ts.setup({})
+      end)
+    end)
+
+    it('accepts nil config', function()
+      assert.has_no.errors(function()
+        fugitive_ts.setup()
+      end)
+    end)
+
+    it('accepts full config', function()
+      assert.has_no.errors(function()
+        fugitive_ts.setup({
+          enabled = false,
+          debug = true,
+          languages = { ['.envrc'] = 'bash' },
+          disabled_languages = { 'markdown' },
+          highlight_headers = false,
+          debounce_ms = 100,
+          max_lines_per_hunk = 1000,
+        })
+      end)
+    end)
+
+    it('accepts partial config', function()
+      assert.has_no.errors(function()
+        fugitive_ts.setup({
+          debounce_ms = 25,
+        })
+      end)
+    end)
+  end)
+
+  describe('attach', function()
+    local function create_buffer(lines)
+      local bufnr = vim.api.nvim_create_buf(false, true)
+      vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, lines or {})
+      return bufnr
+    end
+
+    local function delete_buffer(bufnr)
+      if vim.api.nvim_buf_is_valid(bufnr) then
+        vim.api.nvim_buf_delete(bufnr, { force = true })
+      end
+    end
+
+    before_each(function()
+      fugitive_ts.setup({ enabled = true })
+    end)
+
+    it('does not error on empty buffer', function()
+      local bufnr = create_buffer({})
+      assert.has_no.errors(function()
+        fugitive_ts.attach(bufnr)
+      end)
+      delete_buffer(bufnr)
+    end)
+
+    it('does not error on buffer with content', function()
+      local bufnr = create_buffer({
+        'M test.lua',
+        '@@ -1,1 +1,2 @@',
+        ' local x = 1',
+        '+local y = 2',
+      })
+      assert.has_no.errors(function()
+        fugitive_ts.attach(bufnr)
+      end)
+      delete_buffer(bufnr)
+    end)
+
+    it('is idempotent', function()
+      local bufnr = create_buffer({})
+      assert.has_no.errors(function()
+        fugitive_ts.attach(bufnr)
+        fugitive_ts.attach(bufnr)
+        fugitive_ts.attach(bufnr)
+      end)
+      delete_buffer(bufnr)
+    end)
+  end)
+
+  describe('refresh', function()
+    local function create_buffer(lines)
+      local bufnr = vim.api.nvim_create_buf(false, true)
+      vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, lines or {})
+      return bufnr
+    end
+
+    local function delete_buffer(bufnr)
+      if vim.api.nvim_buf_is_valid(bufnr) then
+        vim.api.nvim_buf_delete(bufnr, { force = true })
+      end
+    end
+
+    before_each(function()
+      fugitive_ts.setup({ enabled = true })
+    end)
+
+    it('does not error on unattached buffer', function()
+      local bufnr = create_buffer({})
+      assert.has_no.errors(function()
+        fugitive_ts.refresh(bufnr)
+      end)
+      delete_buffer(bufnr)
+    end)
+
+    it('does not error on attached buffer', function()
+      local bufnr = create_buffer({})
+      fugitive_ts.attach(bufnr)
+      assert.has_no.errors(function()
+        fugitive_ts.refresh(bufnr)
+      end)
+      delete_buffer(bufnr)
+    end)
+  end)
+
+  describe('config options', function()
+    it('enabled=false prevents highlighting', function()
+      fugitive_ts.setup({ enabled = false })
+      local bufnr = vim.api.nvim_create_buf(false, true)
+      vim.api.nvim_buf_set_lines(bufnr, 0, -1, false, {
+        'M test.lua',
+        '@@ -1,1 +1,2 @@',
+        ' local x = 1',
+        '+local y = 2',
+      })
+      fugitive_ts.attach(bufnr)
+
+      local ns = vim.api.nvim_create_namespace('fugitive_ts')
+      local extmarks = vim.api.nvim_buf_get_extmarks(bufnr, ns, 0, -1, {})
+      assert.are.equal(0, #extmarks)
+
+      vim.api.nvim_buf_delete(bufnr, { force = true })
+    end)
+  end)
+end)