Implement newline corrector for list block.

3 files changed, 108 insertions, 3 deletions

diff --git a/src/clarktown/correctors.clj b/src/clarktown/correctors.clj
index e251595..1a61f2d 100644
--- a/src/clarktown/correctors.clj
+++ b/src/clarktown/correctors.clj
@@ -1,7 +1,8 @@
 (ns clarktown.correctors
   (:require
     [clarktown.correctors.code-block :as code-block]
-    [clarktown.correctors.atx-heading-block :as atx-heading-block]))
+    [clarktown.correctors.atx-heading-block :as atx-heading-block]
+    [clarktown.correctors.list-block :as list-block]))
 
 
 (def
@@ -9,10 +10,12 @@
   default-block-separation-correctors
   {:newline-above
    [code-block/empty-line-above?
-    atx-heading-block/empty-line-above?]
+    atx-heading-block/empty-line-above?
+    list-block/empty-line-above?]
    :newline-below
    [code-block/empty-line-below?
-    atx-heading-block/empty-line-below?]})
+    atx-heading-block/empty-line-below?
+    list-block/empty-line-below?]})
 
 
 (def
diff --git a/src/clarktown/correctors/list_block.clj b/src/clarktown/correctors/list_block.clj
new file mode 100644
index 0000000..cf84bb1
--- /dev/null
+++ b/src/clarktown/correctors/list_block.clj
@@ -0,0 +1,36 @@
+(ns clarktown.correctors.list-block
+  (:require
+    [clojure.string :as string]
+    [clarktown.matchers.list-block :as matcher]))
+
+
+(defn empty-line-above?
+  "Determines whether there's a need for an empty new line
+  above the `line` at the current `index`. In the list block 
+  case that's when the above line is not a newline and is not
+  a list block line."
+  [lines line index]
+  (and (matcher/match? line)
+       (> index 0)
+       (nil? (-> (nth lines (- index 1))
+                 string/trim
+                 matcher/match?))
+       (not (= (-> (nth lines (- index 1))
+                   string/trim)     
+               "")))) 
+ 
+               
+(defn empty-line-below?
+  "Determines whether there's a need for an empty new line
+  above the `line` at the current `index`. In the list block 
+  case that's when the below line is not a newline and is not
+  a list block line."
+  [lines line index]
+  (and (matcher/match? line)
+       (> (- (count lines) 1) index)
+       (nil? (-> (nth lines (+ index 1))
+                 string/trim
+                 matcher/match?))
+       (not (= (-> (nth lines (+ index 1))
+                   string/trim)
+               ""))))
diff --git a/test/clarktown/correctors/list_block_test.clj b/test/clarktown/correctors/list_block_test.clj
new file mode 100644
index 0000000..d435caf
--- /dev/null
+++ b/test/clarktown/correctors/list_block_test.clj
@@ -0,0 +1,66 @@
+(ns clarktown.correctors.list-block-test
+  (:require
+    [clojure.test :refer [deftest testing is]]
+    [clarktown.correctors.list-block :as corrector]))
+
+
+(deftest line-block-corrector-test
+  (testing "Empty line above"
+    (let [line "1. Hello"
+          lines ["Some text goes here" line] 
+          index 1]
+      (is (true? (corrector/empty-line-above? lines line index)))))
+
+  (testing "Empty line above II"
+    (let [line "* Hello"
+          lines ["Some text goes here" line]
+          index 1]
+      (is (true? (corrector/empty-line-above? lines line index)))))
+              
+  (testing "No empty line above"
+    (let [line "1. Hello" 
+          lines ["Some text goes here" "\n" line]
+          index 2]    
+      (is (false? (corrector/empty-line-above? lines line index)))))
+
+  (testing "No empty line above II"
+    (let [line "* Hello"
+          lines ["Some text goes here" "\n" line]
+          index 2]
+      (is (false? (corrector/empty-line-above? lines line index)))))
+
+  (testing "No empty line above III"
+    (let [line "* Hello"
+          lines ["Some text here" "* Asd" line]
+          index 2]
+      (is (false? (corrector/empty-line-above? lines line index)))))
+       
+  (testing "Empty line below"
+    (let [line "1. Hello"
+          lines [line "Some text goes here"]
+          index 0]
+      (is (true? (corrector/empty-line-below? lines line index)))))
+
+  (testing "Empty line below II"
+    (let [line "* Hello"
+          lines [line "Some text goes here"]
+          index 0]
+      (is (true? (corrector/empty-line-below? lines line index)))))
+                          
+  (testing "No empty line below"
+    (let [line "1. Hello" 
+          lines [line "\n" "Some text goes here"]
+          index 0]
+      (is (false? (corrector/empty-line-below? lines line index)))))
+    
+  (testing "No empty line below II"
+    (let [line "* Hello"
+          lines [line "\n" "Some text goes here"]
+          index 0]
+      (is (false? (corrector/empty-line-below? lines line index)))))
+    
+  (testing "No empty line below III"
+    (let [line "* Hello"
+          lines [line "* Asd" "Some text goes here"]
+          index 0]
+      (is (false? (corrector/empty-line-below? lines line index))))))