change naming of StringSplitCall methods

javascript/ql/src/Security/CWE-020/IncompleteUrlSchemeCheck.ql

@@ -28,9 +28,9 @@ class DangerousScheme extends string {
 DataFlow::SourceNode schemeOf(DataFlow::Node url) {
   // url.split(":")[0]
   exists(StringSplitCall split |
-    split.getSplitAt() = ":" and
+    split.getSeparator() = ":" and
     result = split.getAnElementRead(0) and
-    url = split.getUnsplit()
+    url = split.getBaseString()
   )
   or
   // url.getScheme(), url.getProtocol(), getScheme(url), getProtocol(url)

javascript/ql/src/Security/CWE-400/PrototypePollutionUtility.ql

@@ -23,8 +23,8 @@ import semmle.javascript.DynamicPropertyAccess
  */
 class SplitCall extends StringSplitCall {
   SplitCall() {
-    getSplitAt() = "." and
-    getUnsplit() instanceof ParameterNode
+    getSeparator() = "." and
+    getBaseString() instanceof ParameterNode
   }
 }
 

javascript/ql/src/semmle/javascript/StandardLibrary.qll

@@ -170,9 +170,9 @@ class StringSplitCall extends DataFlow::MethodCallNode {
   }
 
   /**
-   * Gets a the SourceNode for the string before it is split.
+   * Gets the DataFlow::Node for the base string that is split.
    */
-  DataFlow::SourceNode getUnsplit() { result = getReceiver().getALocalSource() }
+  DataFlow::Node getBaseString() { result = getReceiver() }
 
   /**
    * Gets a read of the `i`th element from the split string.

javascript/ql/src/semmle/javascript/security/dataflow/TaintedPath.qll

@@ -98,8 +98,8 @@ module TaintedPath {
       )
       or
       // A `str.split()` call can either split into path elements (`str.split("/")`) or split by some other string.
-      exists(StringSplitCall mcn | dst = mcn and mcn.getUnsplit() = src |
-        if mcn.getSplitAt() = "/"
+      exists(StringSplitCall mcn | dst = mcn and mcn.getBaseString() = src |
+        if mcn.getSeparator() = "/"
         then
           srclabel.(Label::PosixPath).canContainDotDotSlash() and
           dstlabel instanceof Label::SplitPath

javascript/ql/src/semmle/javascript/security/dataflow/Xss.qll

@@ -286,8 +286,8 @@ module DomBasedXss {
 
     QueryPrefixSanitizer() {
       this = splitCall.getAnElementRead(0) and
-      splitCall.getSplitAt() = "?" and
-      splitCall.getUnsplit() = [DOM::locationRef(), DOM::locationRef().getAPropertyRead("href")]
+      splitCall.getSeparator() = "?" and
+      splitCall.getBaseString().getALocalSource() = [DOM::locationRef(), DOM::locationRef().getAPropertyRead("href")]
     }
   }