Add embedded KJV support

tests/test_offline_kjv.nim

@@ -0,0 +1,84 @@
+import std/[strutils, unittest]
+
+import ../src/kjv
+import ../src/reference_parser
+
+suite "reference parser":
+  test "parses single verse references":
+    let reference = parseReference("John 3:16")
+
+    check reference.book.code == "JHN"
+    check reference.ranges.len == 1
+    check reference.ranges[0].start.chapter == 3
+    check reference.ranges[0].start.verse == 16
+    check reference.ranges[0].finish == reference.ranges[0].start
+    check $reference == "John 3:16"
+
+  test "parses verse lists using the previous chapter":
+    let reference = parseReference("John 3:16,20-21")
+
+    check reference.ranges.len == 2
+    check reference.ranges[1].start.chapter == 3
+    check reference.ranges[1].start.verse == 20
+    check reference.ranges[1].finish.chapter == 3
+    check reference.ranges[1].finish.verse == 21
+    check $reference == "John 3:16, 3:20-21"
+
+  test "parses chapter ranges":
+    let reference = parseReference("John 3-4")
+
+    check reference.ranges.len == 1
+    check reference.ranges[0].start.chapter == 3
+    check reference.ranges[0].start.verse == 0
+    check reference.ranges[0].finish.chapter == 4
+    check reference.ranges[0].finish.verse == 0
+    check $reference == "John 3-4"
+
+  test "parses abbreviated numbered books":
+    let reference = parseReference("1 Jn 1:9")
+
+    check reference.book.code == "1JN"
+    check reference.ranges[0].start.chapter == 1
+    check reference.ranges[0].start.verse == 9
+    check $reference == "1 John 1:9"
+
+  test "parses unique canonical book prefixes":
+    check parseReference("Gene 1:1").book.code == "GEN"
+    check parseReference("Phile 3").book.code == "PHM"
+    check parseReference("Phili 1:6").book.code == "PHP"
+
+  test "rejects ambiguous canonical book prefixes":
+    expect ValueError:
+      discard parseReference("Phil 1")
+
+  test "normalizes single-chapter book references":
+    let reference = parseReference("Jude 3-4")
+
+    check reference.book.code == "JUD"
+    check reference.ranges[0].start.chapter == 1
+    check reference.ranges[0].start.verse == 3
+    check reference.ranges[0].finish.chapter == 1
+    check reference.ranges[0].finish.verse == 4
+    check $reference == "Jude 3-4"
+
+  test "parses semicolon-separated references":
+    let references = parseReferences("Psalm 23; John 3:16")
+
+    check references.len == 2
+    check references[0].book.code == "PSA"
+    check references[1].book.code == "JHN"
+
+suite "offline KJV backend":
+  test "fetches a single embedded verse":
+    let passages = kjv.fetchPassages("John 3:16")
+
+    check passages.len == 1
+    check passages[0].startsWith("John 3:16\n")
+    check passages[0].contains("  [16] ")
+
+  test "fetches a single-chapter embedded verse":
+    let passages = kjv.fetchPassages("Jude 3")
+
+    check passages.len == 1
+    check passages[0].startsWith("Jude 3\n")
+    check passages[0].contains("  [3] ")